136899 has 24 divisors (see below), whose sum is σ = 235872. Its totient is φ = 74880.

The previous prime is 136897. The next prime is 136943. The reversal of 136899 is 998631.

It is a Cunningham number, because it is equal to 370²-1.

It is not a de Polignac number, because 136899 - 2¹ = 136897 is a prime.

136899 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (136897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2557 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (9828).

2¹³⁶⁸⁹⁹ is an apocalyptic number.

136899 is a deficient number, since it is larger than the sum of its proper divisors (98973).

136899 is a wasteful number, since it uses less digits than its factorization.

136899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 104 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 136899 is about 369.9986486462. The cubic root of 136899 is about 51.5386958995.

It can be divided in two parts, 13689 and 9, that multiplied together give a square (123201 = 351²).

The spelling of 136899 in words is "one hundred thirty-six thousand, eight hundred ninety-nine".